Carton.



E. W. THUMB. GABTON. APPLICATION FILED 001.1,,1913.

1,103,708. Patented July 14,1914- I BY I v DRIVE Y8 EUGENE mammals, OFCHICAGO, rumors.

. CARTON.

To all whom t'tmay concern:

Be it known that I, EUGENE a citizen of the United States, and aresldent of Chicago, in the county of Cook and State of Illinois, haveinvented a new and Improved Carton, of which the following is a full,clear, and exact description.

This invention relates to improvements in cartons, and has for an objectto provide an improved structure in which the end is locked in placewithout the use of additional material in the construction thereof.

Another object of the invention is to provide a carton which is providedwith a tu1'ned over end portion and suitable flaps, the turned-over endportion having a notch between the remaining body part thereof and theflap so as to allow the flap to spring beneath the adjoining flaps,thereby presenting a locking structure.

In carrying out the object of the invention the carton or box may bemade of any desired shape, and provided with a pair of flaps extendingfromthe side of the box W. THoMn,

across the end, and an end member formed.

with a body and a side flap, the side flap being notched at end member,whereby said side flap is adapted to spring beneath the remaining flapsso as to lock the end properly in place.

In the accompanying draw1ng:-Figure 1- is a plan view of a blank fromwhich the box is formed; Fig. 2 is an enlarged detailed perspective viewof one end of the carton; Fig. 3 is a perspective view of the carton ina closed position; Fig. 4 is a fragmentary sectional view on line, 4-4of Fig. 3.

Referring to the accompanying drawings by numeral 1 indicates e body ofa boxor carton which may be 0 any desired size or shape. The ends of thecarton are made similar so that the description of one will apply toboth. From Fig. 2 it will be observed that the sides are provided-withextensions or side flaps 2 and'3, which are designed to be folded overthe end in the usual manner, and the back of the box is provided with anextension 4 forming an end member which merges into the front flap 5. Atthe juncture between end member 4 and'fiap 5 notches 6 and 7 areprovided. One edge of the notches, namely,

Specification of Letters Patent. Application filed October 1, 1913.Serial No. 792,772.

the juncture thereof with the Patented July 14, 1914.

edge 8, extends along the continuation of edge 9, while the oppositeedge 10 is at an angle thereto, as clearly shown in Figs. 1 and 2.Slight variations in this cut may be provided though this particularform has been found desirable as it allows the extreme ends 11 and 12 offlap 5 to slightly bow or project beneath the side flaps 2 and 3, asclearly shown in Fig. 4, whereby theend is locked against accidentalopening.

In assembling the box or carton the same is assembled in the usualmanner, and as soon as the flap 5 is forced in position itnaturally'moves slightly 50 as to permit the edges 10 of the notchedportions of flap 5 to properly interlock with the flaps 2 and 3. In thisway no additional paper or cardboard is necessary to provide lockingmeans and in fact the amount of paper is lessene by the small amountremoved when moving the notches 6 and 7. It will also be noted thatthese incisions do not materially weaken the carton but the flap catchesvery readily and adjusts itself without any effort at all other thanthat needed to push it in place.

Having thus described my invention I claim as new and. desire to secureby Letters Patent,-

In a carton of the class described, a pair of side flaps at the end, andan endmember provided with a front flap, said end member being adaptedto extend entirely across the carton so as to cover the end of themember being adapted to-be inserted into the carton at the edges of theside flaps, said front flap being notched at each, end adjacent thejuncture between the front flap and the end member, whereby when saidlast mentioned flap is forced into the carton the ends thereof willengage the side flaps and lock the entire end of the box'against selfopening.

In testnnony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

v EUGENE W. THUMB. Witnesses:

ANDREW S'raAUn, GEORGE WATT.

' same, and said front flap carried by the end

